package collection;

import java.util.ArrayList;
import java.util.Collection;

//集合间的操作
public class CollectionOperDemo {
    public static void main(String[] args) {
        Collection c1 = new ArrayList();
        c1.add("java");
        c1.add("c++");
        c1.add(".net");
        System.out.println("c1:"+c1);//c1;[java, c++, .net]

        Collection c2 =new ArrayList();
        c2.add("android");
        c2.add("ios");
        c2.add("java");
        System.out.println("c2:"+c2);//c2:[android, ios, java]

        c1.addAll(c2);//将集合c2添加到c1中
        System.out.println("c1:"+c1);//c1:[java,c++，.net, android, ios, java]
        System.out.println("c2:"+c2);//c2:[android, ios, java]

        Collection c3= new ArrayList();
        c3.add("c++");
        c3.add("android");
        c3.add("php");
        System.out.println("c3:"+c3);

        boolean contains = c1.containsAll(c3);//判断c1中是否包含c3中的“所有元素”
        System.out.println("是否包含："+contains);//是否包含：false

/*
        //取交集：c1中仅保留与c3所共有的元素，而c3不变
        c1.retainAll(c3);
        System.out.println("c1:" + c1);//c1:[c++, android]
        System.out.println("c3:" + c3);//c3:[c++, android, php]
*/
        //删交集：将c1中与c3中共有的元素删除，c3不变
        c1.removeAll(c3);
        System.out.println(c1);//c1:[java, .net, ios, java]
        System.out.println(c3);//c3:[c++, android, php]
    }
}
